Naphtholazo benzoylalkylene amines and salts thereof as dyes for acid-modified fibers, leather and paper

ABSTRACT

Naphtholazo benzoylalkylene amines and salts thereof which are useful as dyes for acid-modified fibers, leather and paper, and which are represented by the formula ##STR1## wherein n is 0 or 1, 
     A is an anion, 
     R is C 2  - to C 4  -alkylene 
     R 1  and R 2  independently of one another are C 1  - to C 4  -alkyl, methoxyethyl, cyclohexyl, and R 1  and R 2  together are ##STR2##  and R 3  is methyl, ethyl or hydroxyethyl.

The present invention relates to compounds of the general formula I ##STR3## where Y is hydrogen, chlorine, bromine or nitro, Z is hydrogen, chlorine, bromine, a sulfonic acid ester group or unsubstituted or substituted sulfamyl, X is --O-- or ##STR4## R is alkylene which may or may not be interrupted by oxygen or ##STR5## m is 1 or 2, n is 0 or 1, p is 1 or 2, R¹ and R² independently of one another are each hydrogen, unsubstituted or substituted alkyl, alkenyl, cycloalkyl, aralkyl or aryl, or R¹ and R² together with the nitrogen form a heterocyclic structure, R³ is hydrogen or unsubstituted or substituted alkyl, K is a radical of a coupling component of the naphthol series, A.sup.⊖ is an anion, R⁴ is unsubstituted or substituted alkyl and R⁵ is hydrogen or C₁ -C₄ -alkyl, and the radical ##STR6## may futhermore be an unsubstituted or substituted piperazine radical.

Specific examples of radicals Z, in addition to those stated above, are SO₂ NH₂, SO₂ NHCH₃, SO₂ NHC₂ H₅, SO₂ NHC₃ H₇, SO₂ NHC₄ H₉, SO₂ NHC₆ H₅, SO₂ N(CH₃)₂, SO₂ N(C₂ H₅)₂, SO₂ N(C₃ H₇)₂, SO₂ N(C₄ H₉)₂, SO₂ NHC₂ H₄ OH, ##STR7## SO₂ N(C₂ H₄ OH)₂, SO₂ OCH₂ CH₂ N(CH₃)₂, SO₂ OC₂ H₄ N(C₂ H₅)₂, SO₂ OC₂ H₄ N(C₄ H₉)₂, SO₂ OC₂ H₄ N(CH₂ CH₂)₂ O, SO₂ OCH(CH₃)CH₂ N(CH₃)₂, SO₂ OCH(CH₃)CH₂ N(C₂ H₅)₂, SO₂ OC₄ H₈ N(CH₃)₂ and SO₂ OC₄ H₈ N(C₂ H₅)₂.

Z is particularly preferably hydrogen, chlorine or bromine.

Unsubstituted or substituted alkylene radicals R are of, for example, 2 to 10 carbon atoms, C₂ to C₃ radicals being preferred.

Specific examples are: ##STR8##

As a rule, alkyl radicals R¹ and R² are of 1 to 14 carbon atoms and can be substituted by, for example, N-cycloalkylamino, N,N-di-C₁ -C₅ -alkylamino, hydroxyl or C₁ -C₈ -alkoxy. Other examples of radicals R¹ and R² are allyl, methallyl and C₅ -C₈ -cycloalkyl.

Specific examples in addition to the radicals stated above are the following radicals: methyl, ethyl, n-propyl, isopropyl, n-butyl, isobutyl, n-amyl, isoamyl, n-hexyl, isohexyl, heptyl, octyl, 2-ethylhexyl, decyl, dodecyl, tridecyl, tetradecyl, 2-hydroxyethyl, 2- and 3-hydroxypropyl, hydroxybutyl, cyclopentyl, cyclohexyl and cyclooctyl, N,N-dimethylaminoethyl, N,N-diethylaminoethyl, N,N-dipropylaminoethyl, N,N-dibutylaminoethyl, 3-(N,N-dimethylamino)-propyl, 3-(N,N-diethylamino)-propyl, 3-(N,N-dipropylamino)-propyl and 3-(N,N-dibutylamino)-propyl, N-cyclohexylaminoethyl, 3-(N-cyclohexylamino)-propyl, 3-(N-cyclooctylamino)-propyl, N-methyl-N-cyclohexylaminoethyl, 3-(N-methyl-N-cyclohexylamino)-propyl, benzyl, phenethyl, phenyl and tolyl.

R¹ and R², together with the nitrogen, can form, for example, radicals of the following heterocyclic compounds: pyrrolidine, piperidine, morpholine, piperazine which can be substituted at the nitrogen by methyl, ethyl, n- and isopropyl, n-, iso- and sec.-butyl, 2-hydroxyethyl, 2-aminoethyl, 2- or 3-hydroxypropyl or 2- or 3-aminopropyl, imidazole which can be substituted in the 2- and/or 4-positions by methyl, ethyl, propyl or butyl, and 3-(C₁ -C₁₂ -alkyl)-and vinylimidazole which can be further substituted in the 2- and/or 4-positions by methyl, ethyl, propyl or butyl.

The radical ##STR9## may furthermore be a group of the formula ##STR10##

Other examples of suitable radicals R³ are C₁ -C₁₂ -alkyl and C₂ -C₄ -hydroxyalkyl, such as methyl, ethyl, n- or isopropyl, n- or isobutyl, n- or isoamyl, n- or isohexyl, octyl, 2-ethylhexyl, decyl, dodecyl, 2-hydroxyethyl, 2- or 3-hydroxypropyl, hydroxybutyl or CH₂ CH(OH)CH₂ OH, and benzyl and CH₂ CH₂ (OH)CH₂ Cl.

R³ is preferably C₁ -C₄ -alkyl, C₂ -C₄ -hydroxyalkyl or benzyl, particularly preferably methyl, ethyl or C₂ - or C₃ -hydroxyalkyl.

R⁴ is preferably CH₃, C₂ H₅ or C₂ H₄ OH.

Examples of coupling components K are α-naphthol, naphthalenediols, chloronaphthols, alkylnaphthols and, in particular, β-naphthol.

Examples of anions A.sup.⊖ are chloride, bromide, hydrogen sulfate, sulfate, nitrate, phosphate, hydrogen phosphate, dihydrogen phosphate, carbonate, bicarbonate, tetrachlorozincate, aminosulfonate, methylsulfonate, methylsulfate, ethylsulfate, formate, acetate, hydroxyacetate, aminoacetate, methoxyacetate, propionate, lactate, maleate, malonate, citrate, benzoate, phthalate, benzenesulfonate, toluenesulfonate, oleate and dodecylbenzenesulfonate.

The compounds of the formula I can be prepared, for example, by diazotizing an amine of the formula ##STR11## and reacting the product with a coupling component of the formula

    H--K

The examples which follow illustrate the preparation.

The compounds of the formula I are useful for dyeing acid-modified fibers such as polyacrylonitrile or polyesters, leather and, in particular, paper. In particular, it is also possible to print paper with printing inks containing aqueous solutions of addition salts of I with acids. In the form of the bases or of salts with relatively long-chain carboxylic or sulfonic acids, such as oleic acid or dodecylbenzenesulfonic acid, they are also suitable, for example, for pastes for ballpoint pens, as solvent dyes or for non-aqueous printing inks. In the form of acid addition salts with appropriate anions, the dyes are furthermore readily soluble in water and organic solvents, so that they are useful for the preparation of liquid concentrates.

Of particular importance are compounds of the formula Ia ##STR12## where R, R¹, R², R³ and Y have the stated meanings.

Y is preferably hydrogen or nitro, R is preferably C₂ H₄, C₃ H₆, --CH(CH₃)CH₂ or C₄ H₈, R¹ and R² are each preferably H, CH₃, C₂ H₅, n- or i-C₃ H₇, n-, i- or sec-C₄ H₉, C₂ H₄ OCH₃, ##STR13## or cyclohexyl, and R³ is preferably CH₃, C₂ H₅ or C₂ H₄ OH.

In the examples below, parts and percentages are by weight, unless stated otherwise.

EXAMPLE 1 Preparation of the Diazo Component

187 parts of dimethylaminoethanol are added dropwise to 326 parts of isatoic anhydride in 1,000 parts of dioxane at 60° C., stirring is continued for 1 hour, the mixture is evaporated down under reduced pressure from a water pump, and the residue is distilled under greatly reduced pressure. 402 parts of 2'-dimethylaminoethyl anthranilate pass over at 160° C./0.1 mm Hg.

23.6 parts of the above product are dissolved in a mixture of 125 parts of water, 125 parts of glacial acetic acid and 50 parts of concentrated hydrochloric acid, the solution is cooled to 5° C., and 34.5 parts of a 23% strength aqueous solution of sodium nitrite are then added dropwise. After 3 hours, excess nitrite is destroyed by adding amidosulfonic acid.

14.4 parts of 2-naphthol are dissolved in a warm mixture of 50 parts of 2N sodium hydroxide solution and 150 parts of water, and the mixture is added to the diazonium salt solution at room temperature. To effect coupling, the pH is brought to 4 with ammonia water. The mixture is stirred overnight, after which the product is filtered off under suction, washed with water, pressed thoroughly and dried in an oven to give 21 parts of a pale red powder. The dye can be dissolved in glacial acetic acid and water to give a stable 20% strength liquid formulation. It dyes paper stock brilliant orange, the effluent being only slightly colored. The colored papers can be bleached with hydrosulfite. The compound is of the formula ##STR14##

Other dyes whose hue and affinity for paper stock are substantially the same as that of Example 1 can be prepared by a method similar to that described.

    ______________________________________                                          ##STR15##                                                                     Example No.  RNR.sup.1 R.sup.2                                                 ______________________________________                                         2            C.sub.2 H.sub.4 N(CH.sub.3).sub.2                                 3            C.sub.2 H.sub.4 N(C.sub.2 H.sub.5).sub.2                          4            C.sub.2 H.sub.4 N(C.sub.3 H.sub.7).sub.2                                        ##STR16##                                                        6            C.sub.2 H.sub.4 N(C.sub.4 H.sub.9).sub.2                          7                                                                                            ##STR17##                                                        8                                                                                            ##STR18##                                                        9            C.sub.2 H.sub.4 NHCH.sub. 3                                       10           C.sub.2 H.sub.4 NHC.sub.2 H.sub.5                                 11                                                                                           ##STR19##                                                        12                                                                                           ##STR20##                                                        13                                                                                           ##STR21##                                                        14                                                                                           ##STR22##                                                        15                                                                                           ##STR23##                                                        16                                                                                           ##STR24##                                                        17                                                                                           ##STR25##                                                        18                                                                                           ##STR26##                                                        19           C.sub.2 H.sub.4 N(C.sub.2 H.sub.4 OCH.sub.3).sub.2                20           C.sub.2 H.sub.4 N(C.sub.2 H.sub.4 OC.sub.2 H.sub.5).sub.2         21                                                                                           ##STR27##                                                        22                                                                                           ##STR28##                                                        23                                                                                           ##STR29##                                                        24                                                                                           ##STR30##                                                        25                                                                                           ##STR31##                                                        26                                                                                           ##STR32##                                                        27                                                                                           ##STR33##                                                        28                                                                                           ##STR34##                                                        29                                                                                           ##STR35##                                                        30                                                                                           ##STR36##                                                        31                                                                                           ##STR37##                                                        32                                                                                           ##STR38##                                                        33                                                                                           ##STR39##                                                        34                                                                                           ##STR40##                                                        35                                                                                           ##STR41##                                                        36                                                                                           ##STR42##                                                        37           C.sub.3 H.sub.6 N(CH.sub.3).sub.2                                 38           C.sub.3 H.sub.6 N(C.sub.2 H.sub.5).sub.2                          39                                                                                           ##STR43##                                                        40                                                                                           ##STR44##                                                        41                                                                                           ##STR45##                                                        42                                                                                           ##STR46##                                                        43                                                                                           ##STR47##                                                        44                                                                                           ##STR48##                                                        45                                                                                           ##STR49##                                                        46                                                                                           ##STR50##                                                        47                                                                                           ##STR51##                                                        48           C.sub.4 H.sub.8N(CH.sub.3).sub.2                                  49           C.sub.4 H.sub.8N(C.sub.2 H.sub.5).sub.2                           50           C.sub.4 H.sub.8N(C.sub.3 H.sub.6).sub.2                           51                                                                                           ##STR52##                                                        52                                                                                           ##STR53##                                                        53                                                                                           ##STR54##                                                        ______________________________________                                    

Other dyes which dye paper brilliant orange can be prepared from the corresponding halogenated or sulfochlorinated derivatives of isatoic anhydride by a method similar to that of Example1.

    ______________________________________                                          ##STR55##                                                                      Example No.                                                                            ##STR56##      Y      Z                                               ______________________________________                                         54      COOC.sub.2 H.sub.4 N(CH.sub.3).sub.2                                                          5-Cl   H                                                55                                                                                      ##STR57##     5-Cl   H                                                56      COOC.sub.2 H.sub.4 N(CH.sub.3).sub.2                                                          5-Br   H                                                57                                                                                      ##STR58##     5-Br   H                                                58      COOC.sub.2 H.sub.4 N(CH.sub.3).sub.2                                                          3-Cl   5-Br                                             59      COOC.sub.2 H.sub.4 N(CH.sub.3).sub.2                                                          5-Br   3-Cl                                             60      COOC.sub.2 H.sub.4 N(CH.sub.3).sub.2                                                          H      5-SO.sub.2 OC.sub.2 H.sub.4 N(CH.sub.3).sub.                                   2                                                ______________________________________                                    

EXAMPLE 61 Diazo Component

187.2 parts of 5-nitroisatoic anhydride are introduced into a mixture of 600 parts of dioxane and 85 parts of N,N-dimethylethanolamine at 60° C. When the evolution of gas has ceased, the mixture is cooled to room temperature and filtered, the filtrate is stirred into a large amount of water, and the precipitate is filtered off under suction and dried. The yield is 125 parts. After recrystallization from aqueous ethanol, the product gives the following elemental analysis, the stated values being percentages:

C₁₁ H₁₅ O₄ N₃ : calculated: C, 52.2; H, 6.0; O, 25.3; N, 16.6; found: C, 51.6; H, 5.6; O, 26.5; N, 16.3.

The diazotization equivalent is 261 g/equivalent (theoretical value 253 g/equivalent).

Diazotization and coupling to β-naphthol as described in Example 1 give a dye which dyes paper stock red when used in an aqueous solution containing acetic acid. In acidic solution, the compound is of the formula ##STR59##

The red dyes below can be prepared by a method similar to that of Example 61, using other amino alcohols.

    ______________________________________                                          ##STR60##                                                                      Example No.                                                                                    ##STR61##                                                     ______________________________________                                         62                                                                                              ##STR62##                                                     63              COOC.sub.2 H.sub.4 N(C.sub.2 H.sub.5).sub.2                    64                                                                                              ##STR63##                                                     ______________________________________                                    

EXAMPLE 65 Preparation of the Diazo Component

The diazo component prepared as described in Example 1 is distilled. 13 g of dimethyl sulfate are added dropwise to 21 parts of the distilled product in 100 parts of toluene at 60° C., stirring is continued for one hour at this temperature, the mixture is cooled to room temperature, and the precipitate is filtered off under suction. After drying, the diazotization equivalent is 355 g/equivalent (theoretical value 334 g/equivalent). The compound is of the formula ##STR64##

After diazotization and coupling as described in Example 1, the solution is rendered alkaline with sodium hydroxide solution, the aqueous phase is decanted from the greasy dye, and the latter is dissolved in aqueous glacial acetic acid. The dye dyes paper stock brilliant orange with moderate coloration of the effluent. In this form, the dye is of the formula ##STR65##

EXAMPLE 66

2 parts of a 10 percent strength solution of the dye from Example 1 in acetic acid are added to a suspension of 50 parts of bleached sulfate pulp of about 30° SR in 2,000 parts of water at pH 7. The mixture is stirred for 15 minutes at from 20° to 25° C., after which it is diluted to a solids content of 0.2% with water. Paper sheets are produced with this suspension on a laboratory sheet-forming apparatus, and the sheets are dried for 5 minutes at 100° C. Orange sheets are obtained. The effluent is moderately colored, and the fastness to bleeding with respect to water, aqueous sodium carbonate solution and acetic acid is good. If, instead of bleached pulp, mechanical pulp is used, the effluent is only slightly colored and the fastness to bleeding is good or very good.

When the dyes from Examples 2 to 65 are used, similar dyeing results are obtained.

EXAMPLE 67

1.0 part of a product obtained by milling 90% of the dye described in Example 1 with 10% of amidosulfonic acid was sprinkled into a stirred suspension of 100 parts of a mixture of 70% of bleached pine sulfate pulp and 30% of bleached birch sulfate pulp in 2,000 parts of water, the total stock being of about 30° SR. The mixture is stirred for 10 minutes and diluted to a solids content of 0.2% with water, after which paper sheets are produced on a laboratory sheet-forming apparatus and the sheets are dried for 5 minutes at 100° C. The resulting sheets are dyed in level orange hues and have good fastness to bleeding with respect to water.

Whe products obtained by milling the dyes from Examples 2 to 65 with amidosulfonic acid are used, similar dyeing results are obtained.

EXAMPLE 68

An absorbent web of unsized paper is drawn, at 40°-50° C., through a dye solution composed of 0.5 part of the dye from Example 1, 0.5 part of starch, 3 parts of acetic acid and 96 parts of water. The excess of dye solution is pressed out between two rollers. The dry paper web is found to be dyed in an orange hue. 

I claim:
 1. A compound of the formula: ##STR66## where n is 0 or 1,A is an anion, R is C₂ - to C₄ -alkylene R¹ and R² independently of one another are C₁ - to C₄ -alkyl, methoxyethyl, cyclohexyl, and R¹ and R² together are ##STR67## and R³ is methyl, ethyl or hydroxyethyl.
 2. The compound of claim 1, wherein n is 1 and A is selected from the group consisting of chloride, bromide, hydrogen sulfate, sulfate, nitrate, phosphate, hydrogen phosphate, dihydrogen phosphate, carbonate, bicarbonate, tetrachlorozincate, aminosulfonate, methylsulfonate, methylsulfate, ethylsulfate, formate, acetate, hydroxyacetate, aminoacetate, methoxyacetate, propionate, lactate, maleate, malonate, citrate, benzoate, phthalate, benzenesulfonate, toluenesulfonate, oleate and dodecylbenzenesulfonate.
 3. The compound of claim 1 which is ##STR68## 